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Finding the Fourth Proportional to 327.70, 491.55 and 270.10

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Solution

The fourth proportional to 327.70, 491.55 and 270.10 is: 405.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.70 : 491.55 = 270.10 : x
  2. Step 2: Convert to fraction form
    327.70/491.55 = 270.10/x
  3. Step 3: Cross multiply
    327.70x = 491.55 × 270.10
  4. Step 4: Simplify right side
    327.70x = 132,767.66
  5. Step 5: Solve for x
    x = 132,767.66/327.70
  6. Step 6: Final answer
    x = 405.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.